EP0510247A2 - Procédé et appareil pour la transmission de signaux numériques audio depuis les studios audio vers les stations individuelles d'émission d'un réseau de radiodiffusion terrestre - Google Patents

Procédé et appareil pour la transmission de signaux numériques audio depuis les studios audio vers les stations individuelles d'émission d'un réseau de radiodiffusion terrestre Download PDF

Info

Publication number
EP0510247A2
EP0510247A2 EP91113000A EP91113000A EP0510247A2 EP 0510247 A2 EP0510247 A2 EP 0510247A2 EP 91113000 A EP91113000 A EP 91113000A EP 91113000 A EP91113000 A EP 91113000A EP 0510247 A2 EP0510247 A2 EP 0510247A2
Authority
EP
European Patent Office
Prior art keywords
signals
data
dsr
transmitted
audio signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91113000A
Other languages
German (de)
English (en)
Other versions
EP0510247B1 (fr
EP0510247A3 (en
Inventor
Paul Dipl.-Ing. Fh Dambacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Priority to JP7941392A priority Critical patent/JPH05122176A/ja
Publication of EP0510247A2 publication Critical patent/EP0510247A2/fr
Publication of EP0510247A3 publication Critical patent/EP0510247A3/de
Application granted granted Critical
Publication of EP0510247B1 publication Critical patent/EP0510247B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/95—Arrangements characterised by the broadcast information itself characterised by a specific format, e.g. an encoded audio stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/19—Aspects of broadcast communication characterised by the type of broadcast system digital satellite radio [DSR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/04—Studio equipment; Interconnection of studios

Definitions

  • DAB network digital audio broadcasting, described in “Digital Audio Broadcasting” ITU-COM'89 Geneva, October 1989 and in “Future Systems of Digital Radio Transmission", Bayerischer Rundfunk, Nov. 1990
  • COFDM signal Coded Orthogonal Frequency Division and Multiplexing
  • DS1 -Coder-generated DS1 sound signals are then intermeshed using a data multiplexer using the so-called DSR (Digital Satellite Radio) method and, for example, fed to a satellite earth station in a 4-P SK modulator ("News from Rohde & Schwarz", booklet 114, page 14.)
  • the satellite transmitter transmits, for example, to the satellite at 18 GHz, which transmits to the individual consumer satellite receivers at 12 GHz.
  • a total of 16 digital audio signals can be extracted from the 4PSK-demodulated / decoder desired sound signals are selected again and made audible after digital-analog conversion.
  • the invention is based on the fact that the DS1 / DSR method known per se for supplying consumer radio receivers via a satellite transmitter is best suited for the transmission of the sound signals from a sound studio to the individual transmitter stations of a radio transmitter network, since the one for execution The technology required for this process is very mature and has proven itself for a long time.
  • the DS1 encoders and DSR multiplexers / modulators required to carry out this method are now commercially available devices, as are the DSR demodulators, demultiplexers and decoders required on the receiver side. With such a DS1 / DSR method, however, only sixteen individual programs can be transmitted, since the known DSR coder has only sixteen DS1 channels available.
  • the combination with this DS1 / DSR method in accordance with the invention results in an additional data reduction of the sound signals to be transmitted in the recording studio, taking into account the psychoacoustic phenomena of humans Ear.
  • MUSICAM method Mesking Universal Subband Integrated Coding And Multiplexing; described in "MUSICAM, An Universal Subband Coding System Description" from CCETT, IRT, Matsushita & Philips.
  • a data reduction of a digital audio signal to, for example, 128 or 96 or even 64 kbit / s per mono signal can be achieved, so that several such data-reduced audio signals can be transmitted in one DS1 signal.
  • this combination according to the invention it is achieved that a multiple of the digital signals which can be transmitted per se by the DS1 / DSR method can be transmitted, so that the system is optimally utilized and can also be constructed in a very economical manner from commercially available devices.
  • a method according to the invention is particularly well suited for the supply of the individual transmitter stations of a future DAB network mentioned above, since depending on the degree of data reduction used, for example, three to seven times as many programs can be transmitted than according to the DS1 / DSR transmission technology, which yes one stereo program (or two monoprograms) per DS1 channel and limited to 16 stereo programs per DSR channel.
  • the method according to the invention is also suitable for supplying a conventional terrestrial VHF-FM transmitter network or a so-called compatible DAB network, in which only a single digital program signal is emitted in the frequency band per transmitter as for a VHF-FM transmitter.
  • a conventional satellite transmission system is preferably used as the broadband transmission system in the method according to the invention, but in the same way the transmission can also take place via a broadband cable network, such as is used by Swiss Post for digital radio broadcasting (report no VD14.1049 U of 24.1.91 of the Directorate General PTT).
  • a broadband cable network such as is used by Swiss Post for digital radio broadcasting (report no VD14.1049 U of 24.1.91 of the Directorate General PTT).
  • the transmission of the DSR signals could take place via a fiber optic distribution cable network or also via radio links.
  • FIG. 1 and 2 show the block diagram of a device operating according to the inventive method for transmitting the sound signals P from one or more sound studios to the individual transmission stations S of a radio transmitter network.
  • the transmission takes place according to the well-known DS1 / DSR method.
  • Up to 16 DS1 encoders DCA 1 to DCA16 are provided on the source side, as well as a DSR multiplexer with subsequent 4-PSK modulator (SFP) with corresponding 16 inputs for connecting up to 16 DS1 encoders.
  • SFP 4-PSK modulator
  • n data-reduced audio signals M 1 to M n are transmitted per DS1 channel, so that each DS1 encoder is modified from the DS1 standard Tone signals DS1 / M are generated, which are composed of several n data-reduced tone signals and which are fed to the inputs of the DSR multiplexer SFP.
  • the analog or digital mono or stereo sound signals P are each supplied to a coder C 1 to C n, for example operating according to the MUSICAM method.
  • the originally, for example, 768 kbit / sP sound signals (16 bit, 48 kHz) are thereby reduced to, for example, 128, 96 or 64 kbit / s data.
  • These data-reduced audio signals M 1 to M n are then fed to one of the 16 DS1 coders DCA 1 to DCA 16, in which these data-reduced audio signals M 1 to M n are encoded according to the DS1 method.
  • the MUSICAM coding is preferably already carried out in the studio, the DS1 coding could also be carried out directly in the studio, but it is also possible to first transmit the signals M 1 to M n via digital lines to the satellite ground station and to transmit the DS1- Make coding there only.
  • the outputs of the DS1 encoders DCA1 to DCA16 carry the signals DS1 / M1 to DS1 / M16, which correspond to the original DS1 signals in terms of frame structure and additional information.
  • the 16 DS1 / M signals are intermingled and, together with frame synchronous words, a data stream is generated that is fed directly to the 4-PSK modulator.
  • the error concealment at the input of the DSR multiplexer in accordance with the DS1 standard is used by application according to the invention shut down.
  • the 4-PSK-modulated IF carrier is converted in a converter U 1 to the satellite transmission frequency position of, for example, 18 GHz and transmitted to the actual satellite SAT and from there, for example, again radiated at 12 GHz.
  • Fig. 2 shows the block diagram of a DAB transmitter station.
  • Each individual transmission station S of the transmission network to be supplied is assigned a conventional satellite receiving device E, in which the satellite signal received via the satellite antenna is converted into a frequency position suitable for the subsequent decoding after frequency conversion U2 (outdoor unit) and in a satellite converter DSRU.
  • the output signal of this converter DSRU is fed to a digital sound receiver, DSRE, and decoded there in several (m) decoders DEC1 to DECm.
  • DSRE digital sound receiver
  • DEC1 to DECm decoded there in several (m) decoders
  • up to 16 DS1 / M signals can be transmitted from up to 16 DS1 / M signals to be chosen.
  • These DS1 / M 'signals correspond to the original DS1 / M signals on the source side, but they have a different frame structure.
  • Each of these altogether m DS1 / M 'signals is converted via a demultiplexer DEMUX into the original MUSICAM signals M1 to Mn, which are then fed as digital audio signals to the modulator COFDM of the transmitting station S.
  • the programs desired for broadcasting can be selected and broadcast from a large number of the programs P offered by the source.
  • the actual DS1-DSR satellite transmission technology starting on the source side with the DS1 coders DCA 1 to DCA 16 via multiplexers, satellite transmitting stations, satellites, satellite receiving stations including demultiplexers, is of a known type, as described, for example, in "News von Rohde & Schwarz "Issue 114, page 14.
  • the DS1 coder used for example, are the coder DCA from Rohde & Schwarz, the multiplexer including 4-PSK modulator is, for example, an SFP device from Rohde & Schwarz, the satellite receiver is, for example a device combination of the digital audio converter DSRU and the digital audio receiver DSRE from Rohde & Schwarz.
  • the additionally used MUSICAM encoders C 1 to C n are constructed from commercially available chips, the transmission system according to the invention can therefore be produced very economically.
  • the difference compared to the known DSI / DSR transmission method is that only one left / right stereo signal is not transmitted per DS1 channel, which is coded according to the known 16/14 bit floating point arithmetic with a scale factor, but that several data-reduced sound signals M 1 to M n are transmitted via the net bit rate of 896 kbit / s of each individual DS1 signal, which are correspondingly data-reduced on the basis of psychoacoustic phenomena of the human ear.
  • the baseband coding for example MUSICAM
  • the table in FIG. 4 shows the number of program channels left / right and mono per DS1 channel and per DSR channel, a distinction being made between DSR and MUSICAM-protected and MUSICAM-protected channels.
  • the table shows, for example, MUSICAM 64 for baseband coding with 64Kbit / sec / mono. The calculated channels are based on an integer number of L / R stereo signals per DS1 channel.
  • Satellite receivers working according to the DSR process are now available in consumer technology and also in professional technology.
  • a demultiplexer / decoder is used as a chip component (eg SAA7500 from Philips Semiconductor).
  • SAA7500 from Philips Semiconductor
  • each receiving station E can be constructed very easily and inexpensively from commercially available components.
  • the Demultiplexer / decoder brings the DS1 / M 'data in bit-serial form to an output with uncorrected bit errors and to a second output with error correction according to the DSR standard. This data is tapped before the circuit function error concealment.
  • each individual transmitting station S is also of a known type.
  • the COFDM signals in the DAB single-frequency network must be both isochronous and word-synchronous (i.e., bit-synchronous). Isochronousness is given in that the DS1 coders are each synchronized by a clock signal CS1 of 1.024 MHz, so that all DS1 / M signals and the DSR signals are isochronous.
  • part of the DS1 data channel AI with the net bit rate of 24 Kbit / sec the so-called U / V channel for additional information for the transmission of a corresponding word synchronization signal, or part of a still free part in the so-called special service, is used Main frame B of the DSR signal frame (special information SI of the DSR frame with 32 Kbit / sec).
  • the word "synchronization signal" additionally transmitted in this way can then be used in each individual transmission station S for word synchronization of the programs broadcast.
  • each individual FM transmitting station FM1 to FMn has additional D / A according to the individual MUSICAM decoders D 1 to D n according to FIG. Converters, which generate the analog audio signals from the digital audio signals, which are separated again via the demultiplexer and decoded again according to the MUSICAM method, and are to be emitted via the transmitter.
  • the method according to FIG. 2 can also be used for DAB transmitters with only one digital program signal per transmitter.
  • This so-called “Compatible DAB” is also based on MUSICAM and represents an in-band solution with the use of a VHF-FM bandwidth.
  • RDS radio data systems
  • program-dependent data which are generated, for example, in the recording studio
  • RDS signals can also be transmitted to the RDS coder in the VHF-FM transmitter using the method according to the invention, the program-dependent RDS data A11 to Aln being addressed in the recording studio for each individual MUSICAM channel M1 to Mn and multiplexed into one separate information unit AI-MUX can be summarized and then transmitted in the additional information channel of the DS1 signal, which takes place in the DS1 encoder DCA 1 to DCA 16 in a known manner.
  • 1, 2 and 3 can of course also be used together if, for example, a DAB transmitter network and an FM transmitter network operated in parallel are to be supplied with programs at the same time.
  • not all DS1 channels of the transmission system have to be used for the purpose according to the invention for the composition of the DS1 / M signals from several additional data-reduced audio signals, it is quite possible to use a part of the 16 DS1 channels available in the usual way to feed pure, non-data-reduced digital DS1 audio signal and to use only the rest of these DS1 channels for the purpose according to the invention with different data rates.
  • the method according to the invention can also be used directly to expand the known digital radio system DSR (Extended DSR: EDSR).
  • DSR Extended DSR: EDSR
  • the known DSR transmission system can thus be expanded to a multiple of the programs previously offered.
  • FIG. 5 shows on the basis of a block diagram of a DSR satellite radio receiver FT990 from Philips how such a commercial consumer receiver can be easily supplemented for the direct reception of digital audio signals transmitted according to the invention.
  • This consumer receiver according to FIG. 5 ent speaks in principle of the device combination DSRU combined with a digital sound receiver DSRE from Rohde & Schwarz, as shown and described in FIG. 2.
  • the signal received via satellite antenna is converted to an intermediate frequency of 118MHz in a tuner with subsequent frequency converter and then fed into the 4-PSK demodulator.
  • the demodulated signal is fed to the DSR decoder SAA 7500.
  • the decoded signal is fed to a D / A converter via a digital filter, and the stereo sound signal received via satellite is then available for further processing at the output of an analog filter.
  • This commercial structure of a consumer receiver can be converted in a simple manner only by adding a demultiplexer DEMUX and a program selection logic M-select into a receiver which is suitable for the direct reception of digital audio signals transmitted according to the inventive method over a satellite link.
  • the outputs TFKN and DIE or DEC of the DSR decoder are connected to the demultiplexer DEMUX, the output TFKN supplies a clock signal with 160 bits / frame (31.25 us), the output DIE supplies the DS1 / M 'signal in 77 bits / blocks in DSR-corrected form, the output DEC carries the DS1 / M 'signal in 63 bit BCH blocks in DSR-corrected form.
  • the DS1 / M 'signals fed from the outputs DEC or DIE to the demultiplexer DEMUX are converted back into the original MUSICAM signals M 1 to M n , via the selection logic M-select assigned to the output of the demultiplexer, the MUSICAM desired by the user Signal selected, the selected MUSICAM signal is fed to the subsequent MUSICAM decoder, which in turn is, for example, a commercially available chip, for example from Philips Semiconductor, the decoded signal of this MUSICAM decoder is then sent to the input of the D / A converter via a selector switch fed.
  • the customer can select and listen to any MUSICAM signal that is fed in on the source side via the satellite link.
  • the selector switch it is possible to use the consumer receiver either in its original mode of operation, i.e. up to per DSR 16 stereo signals are transmitted, in the other switch position of this switch the MUSICAM-coded sound signals are evaluated, so that in each individual DS1 channel several sound signals can be transmitted and selected by the user.
  • the range of programs for a user can be expanded from 16 programs to date to e.g. 64 stereo programs when using MUSICAM with 96kBit / s / mono signal.
  • the MUSICAM decoder and the demultiplexer are simple, commercially available LSI chips, so that, for example, the range of programs can be expanded by a factor of 4 in a very economical manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
EP91113000A 1991-04-25 1991-08-02 Procédé et appareil pour la transmission de signaux numériques audio depuis les studios audio vers les stations individuelles d'émission d'un réseau de radiodiffusion terrestre Expired - Lifetime EP0510247B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7941392A JPH05122176A (ja) 1991-04-25 1992-02-14 放送網内のデイジタルオーデイオ信号伝送方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4113584 1991-04-25
DE4113584A DE4113584A1 (de) 1991-04-25 1991-04-25 Verfahren und einrichtung zum uebertragen der digitalen tonsignale von tonstudios zu den einzelnen sendestationen eines rundfunk-sendernetzes

Publications (3)

Publication Number Publication Date
EP0510247A2 true EP0510247A2 (fr) 1992-10-28
EP0510247A3 EP0510247A3 (en) 1992-12-09
EP0510247B1 EP0510247B1 (fr) 1996-06-12

Family

ID=6430369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113000A Expired - Lifetime EP0510247B1 (fr) 1991-04-25 1991-08-02 Procédé et appareil pour la transmission de signaux numériques audio depuis les studios audio vers les stations individuelles d'émission d'un réseau de radiodiffusion terrestre

Country Status (3)

Country Link
EP (1) EP0510247B1 (fr)
AT (1) ATE139391T1 (fr)
DE (2) DE4113584A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738440A1 (fr) * 1993-04-16 1996-10-23 REBEC, Mihailo V. Systemes globaux de communications video
US6778649B2 (en) 1995-04-10 2004-08-17 Starguide Digital Networks, Inc. Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US7792068B2 (en) 1998-04-03 2010-09-07 Robert Iii Roswell Satellite receiver/router, system, and method of use
IT201700115787A1 (it) * 2017-10-13 2019-04-13 Itel Elettr E Telecomunicazioni S N C Metodo di trasmissione da terra di un segnale audio radiofonico verso un satellite, e di rilevazione di disturbi nel segnale audio radiofonico che è stato successivamente ri-trasmesso dal satellite e ricevuto a terra, e sistema che attua tale metodo

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239509A1 (de) * 1992-11-25 1994-05-26 Daimler Benz Ag Verfahren und Empfänger für die terrestrische digitale Rundfunkübertragung
DE4241857A1 (de) * 1992-12-11 1994-06-16 Thomson Brandt Gmbh Rundfunkempfänger mit einem Zusatzdatendecoder
DE4341211C1 (de) * 1993-12-03 1995-04-20 Grundig Emv Verfahren und Schaltungsanordnung zum Einfügen von Daten in ein Übertragungssignal
DE4343629C2 (de) * 1993-12-21 1997-05-28 Grundig Emv System zur Erzeugung von digitalen Signalen für eine Satellitenübertragung
US7194757B1 (en) 1998-03-06 2007-03-20 Starguide Digital Network, Inc. Method and apparatus for push and pull distribution of multimedia
US8284774B2 (en) 1998-04-03 2012-10-09 Megawave Audio Llc Ethernet digital storage (EDS) card and satellite transmission system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, INCLUDING SUPERCOMM TECHNICAL SESSIONS Bd. 3, 1990, NEW YORK, US Seiten 937 - 941 G STOLL ET AL. 'High quality audio bit-rate reduction system family for different applications' *
PROCEEDINGS - 7TH INTERNATIONAL CONFERENCE ON DIGITAL SATELLITE COMMUNICATIONS Mai 1986, BERLIN, DE Seiten 41 - 48 W SCHREITMÜLLER ET AL. 'DSR - A digital sound broadcasting system for DBS and its possible extension to multiple access' *
RUNDFUNKTECHNISCHE MITTEILUNGEN Bd. 33, Nr. 1, Januar 1989, NORDERSTEDT, DE Seiten 1 - 7 , XP579 U ASSMUS 'Datenübertragung im DSR' *
RUNDFUNKTECHNISCHE MITTEILUNGEN Bd. 35, Nr. 2, März 1991, NORDESTEDT, DE Seiten 45 - 66 , XP229902 G PLENGE 'DAB - Ein neues Hörrundfunksystem - Stand der Entwicklung und Wege zu seiner Einführung' *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738440A1 (fr) * 1993-04-16 1996-10-23 REBEC, Mihailo V. Systemes globaux de communications video
EP0738440A4 (fr) * 1993-04-16 1997-08-06 Mihailo V Rebec Systemes globaux de communications video
US6778649B2 (en) 1995-04-10 2004-08-17 Starguide Digital Networks, Inc. Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US7792068B2 (en) 1998-04-03 2010-09-07 Robert Iii Roswell Satellite receiver/router, system, and method of use
IT201700115787A1 (it) * 2017-10-13 2019-04-13 Itel Elettr E Telecomunicazioni S N C Metodo di trasmissione da terra di un segnale audio radiofonico verso un satellite, e di rilevazione di disturbi nel segnale audio radiofonico che è stato successivamente ri-trasmesso dal satellite e ricevuto a terra, e sistema che attua tale metodo

Also Published As

Publication number Publication date
EP0510247B1 (fr) 1996-06-12
DE59107932D1 (de) 1996-07-18
ATE139391T1 (de) 1996-06-15
DE4113584A1 (de) 1992-10-29
EP0510247A3 (en) 1992-12-09

Similar Documents

Publication Publication Date Title
EP0591643B1 (fr) Système de radiodiffusion numérique comportant un réseau d'émetteurs
EP0527289B1 (fr) Procédé pour la transmission de signaux TVHD numériques
DE68924695T3 (de) Vorrichtung und Verfahren für Digitalton in dem FM-Rundfunkband.
US5333155A (en) Method and system for transmitting digital audio signals from recording studios to the various master stations of a broadcasting network
DE69933622T2 (de) Ein Zeitmultiplex-Ansatz für Rundfunk mit mehreren Sendern
EP0610313B1 (fr) Systeme de radiodiffusion et recepteur de radiodiffusion
DE60023655T2 (de) Tonmischungsverfahren, sender und empfänger für am und fm in-band auf-kanal digitalen tonrundfunk
EP0271805B1 (fr) Système de transmission
DE60033718T2 (de) Vorrichtung für die Übertragung mehrerer Datenströme im gleichen Band und Kanal
EP2119078A2 (fr) Dispositif et procédé permettant de produire un signal à émettre ou un signal décodé
EP0510247B1 (fr) Procédé et appareil pour la transmission de signaux numériques audio depuis les studios audio vers les stations individuelles d'émission d'un réseau de radiodiffusion terrestre
DE60033209T2 (de) Abstimmungsanordnung für Kodedivisionsmultiplexrundfunksystem
EP0692889A1 (fr) Méthode, émetteur et récepteur pour la transmission et la sélection de programmes de radiodiffusion locaux dans un réseau en onde commune
DE4013204C2 (de) Verfahren zur Übertragung eines Datenstromes von digitalen Daten
EP2854314B1 (fr) Procédé et dispositif pour l'insertion de messages d'alarme dans un ensemble DAB dans un tunnel
EP0622917B1 (fr) Méthode pour la transmission de signaux audiovisuels numériques comprimés à travers un canal de satéllite ou de télédistribution par câble
DE4425973C1 (de) Verfahren zur adaptiven Festlegung der Übertragungskapazität eines Übertragungskanals
DE4237366A1 (de) Anordnung zum Übertragen digitaler Tonsignale von mehreren Programmanbietern zu den Sendestationen eines Rundfunk-Sendernetzes
DE4345251C2 (de) System zur Erzeugung von Rundfunksignalen für eine Satellitenübertragung
DE4343629C2 (de) System zur Erzeugung von digitalen Signalen für eine Satellitenübertragung
EP1201052B1 (fr) Procede pour la preparation de donnees audio en code source, ainsi qu'emetteur et recepteur pour ce procede
EP0587626B1 (fr) Procede de transmission radiophonique d'un signal de commande variable dans le temps et recepteur radiophonique pour la reception de ce signal de commande
JPH05122176A (ja) 放送網内のデイジタルオーデイオ信号伝送方法
DE102017202096A1 (de) Empfangskonverter für digitale Radiosender

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI NL SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19921126

17Q First examination report despatched

Effective date: 19950207

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19960612

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19960612

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960612

Ref country code: GB

Effective date: 19960612

Ref country code: FR

Effective date: 19960612

REF Corresponds to:

Ref document number: 139391

Country of ref document: AT

Date of ref document: 19960615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59107932

Country of ref document: DE

Date of ref document: 19960718

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960912

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
EN Fr: translation not filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWAELTE SCHAAD, BALASS, MENZL & PARTNER AG

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19960612

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970703

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970822

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980831

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981030

Year of fee payment: 8

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000601